US1557802A

US1557802A - Hoisting hook

Info

Publication number: US1557802A
Application number: US33402A
Authority: US
Inventors: Clark John
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-05-28
Filing date: 1925-05-28
Publication date: 1925-10-20
Anticipated expiration: 1942-10-20

Description

- 1,557,802 J. CLARK HOISTING HOOK Filed May 28, 1925 2 Shets-Sheet 1 o 0 0 0 0 O O "3 w Oct. 20, 1925 Patented Oct. 20, 1925.

' .ron1v CLARK, or BUFFALO, NEW YORK.

HOISTING HOOK.

-- Application filed may 28, 1925. Serial 1%} 33,492..

To all whom it may concemip Beit known that I, JoH CLARK, a citizen of the United States, residing at Buf falo, in the county of Erie and State of Newv York, have invented new and useful Improvements in Hoisting Hooks, of which the following is a specification.

, This invention relates to a. hoisting hook which is more particularly designed for use in connection with hoisting tackle and ma chinery which lifts heavy loads from one place to another, suchfor example as It is theobject of this invention to'pro vide hoisting. hook for this purpose which is not only stronger and more durable than those heretofore; knownjbut is also not liable to foul against adjacent ob structions and is also incapableof becoming detached from the'load and thereby enable freight to be handled withmaximum safety to; the operatives and also without any de-' lay due to possible interferences. v

In the accompanying drawingsz Figure 1 is a side elevation ofahoisting hook which, embodies a satisfactory form of my invention j J z I 1 j Figure 2, is a front elevation of the same. Figure 8,v is a. vertical longitudinal section of the same. I

Figurel, isa horizontal section taken on line 4-4, Fig. 1.- v f Similar characters of reference indicate like parts throughout the several views.

The main part or body of this hoisting hook comprises an upright shank 10 and a forwardly and upwardly turned beak 11 at the lower end of this, shank forming an upwardly opening month between this shank and beak which is adapted to receive the ring, rope or other means whereby the load to be lifted is attached to the hoisting hook. At its upper end the shank is' provided with means whereby the same is connected to the hoisting mechanism. In the present instance this i accomplishedbi m ans f an eye 12 which overhang forwardly from the upper end of. the shank and receives the lowermost link .13 of ahoisting chain formingpart ofthe hoisting tackle ormechanisnn'such as that now in .eommon use for this purpose. I y angingthe attaching eye 12 for v Wardly the center of' gravity of the'hoist ingihook is broughtnearly in line with th'e month of. the hoisting hookso that the Weight of the load suspended by the ho ing hook will be forced to hang.- to a greater extent from the: shank lOand thereby re lieve the beak 11 to. acorrespondingi extent from this load so asto reduce thelliability of breaking the latter to a minimum. v e For the purpose of still further increas ing the strength of the; beak, also to prev vent accidental disengagement of .therload from the mouthlof the hoisting hook and also to prevent the hoisting hook from fouling or; becoming :caught. against ob structions, the following. means are: pro; vided:. 3 j if Movable intoandtout ofa. positionacross the-mouth of the hoisting hook in a keeper or; latch .14: which is .,preferably perm a-. nently I connected with the upper part I of the shank while its lower endis detachably connected with the .beak: of .the hoisting hook so as to permit of opening and closing the mouth] of the same.

At itsxlowergend h1s keeper or latch is provided with an inwardly projecting hook 15 which in its operative position projects inpart of thebeak 1 H a ,At its'upper endthe, latch or keeper is connected by means of a swivel joint with wardly through an opening 16 in the upper the upper part of the beaklO below the eye 12thereof so asto permit thekeeper to not only swing in avertical plane parallel with the plane of the shank 10 and beak ll for the purpose of engaging. and disengaging thehook 15 of the keeper with theo ening 16 of the beaklbut to permit the ee'perto swing Vertically in a plane at right angles to the plane ofthe shank, and beak for the purpose of permitting the keeper to completely uncover-the mouth of. the hoist-1 ing hook and permit a ring, rope or other means of attachment on the load to be freely inserted into the mout-hof the'hoisting' hook and alsorremoved therefrom... The

preferred form of this swivellingconnection with an upwardly projecting foot 17, the inner side of which is adapted to bear against the opposing upper part of the inner side of the shanklO. The upper part of the in-.

ner side of this foot isrounded, as shown at 18 and-adapted to engage with the adj acent rounded surface 19 on the upper part of theinner side of the shank 10 and thereby.

permit the keeper to be locked or turned in avertica'l plane parallel with the beak 11 and shank 10 .for the purpose of engaging and disengagingv the hook 15 of the keeper with the opening 16 The foot of the keeper ,is provioled with a vertical slot 20 which receives the'central part of a. clamping or tightening bolt 21 which latter is connected at its inner end with the'adja'cent upper part of-the shank 10 by means of a screw joint 22,

as shown in Figs. and 4; The outer end of the bolt .21 provided With. a screw thread 23, preferably of the acme type which receives a clamping screw nut 24 adapted to engage with the outer side of the foot 17 of the keeper and press the same against the shank'IO for the purpose-of holding the keeper across the mouth of the hoisting hook and in an interlocked position with the beak i 'of thesame. In order to permit the keeper to rock freely in a vertical plane" parallel with the shank 10'andbeak 11 upon loosening the clamping bolt24 only to a moderate extent the co-operating surfaces of the :7 clamping nut 24 and-the coupling'foot 17 of the keeper are co'nstructed'so that a spherical joint or ball joint is formed between the same, this being accomplished by making the inner side 25 of the nut of convex spherical form and the outer side of the foot 17 of concave spherical form, as shown in Figs. 3 and 4:. i

' Complete detachment of the clamping nut 24 from the clamping and pivot bolt 21 is 'prevented. by means of astop device which preferably consists of a stop disk 27-arranged on the outer end of the clamping bolt 21 and over-hanging the sides "ofthe same and detachably connected with this bolt by means of a screw 28 or other suitable means. In order t'o'avoid making the clamping bolt 21 unduly long and still per mit the. clamping'nut 24 to be unscrewed as far as necessary to completely release the keeper a recess 29 is formed on the outer side of this nut which receives the stop disk 27in the outermost position of this nut, as shown by dotted lines in Fig. 3.

. Turning of the clamping nut 24 may be effected in any sultable manner for instance by nurling the periphery thereof ,-as shown at'SOin Fig. 1 and also by inserting a wrench pin into one oranother of a plurality of wrench openingsSl formed in different parts of the periphery of this screw nut, as shown in Figs. 1, 3 ands.

When this hoisting hook is in use and the keeper is locked in a position across the mouth of the same the hook 15 of the keeper engages-with the opening 16 of the beak 11, the foot 17 of the keeper engages the lower end ofits slot 20 with the clamping bolt 21 and the screw nut 24 presses this foot againstthe upper part of the shank 10, as shown by full lines in Figs. '1 and V 3. For the purpose of opening the mouth of the hook in order to permit the load to\ be detached from the month thereofand another load substituted, the screw ,nut, 24 is first loosened by unscrewing the same suf ficiently for 'thispurpose after which the keeper may be turned in a vertical plane" parallel with the plane of the shankglO and beak 11. At which time the foot 17 at the upper end. of the keeper will slide downwardly between the nut and shank 10 1 until the upper part of the slot 20 of the foot engages with the top of the clamping bolt 21, thereby releasing the hook 15 of .the keeper from the beak 11, as shown by dotted lines in Fig. 3. The keeper may now be swung in a vertical plane at right angles to'the 'plane'of the shank and beak of the hoisting hook" 'for' the purpose of completely' uncovering the mouth of the hoisting hook, this extreme opening position of the keeper being representedby dotted lines in Fig. '1. I

Upon reversing the'operation ofthe parts as just described the keeper Will be again returned to its working position for closing the mouth-of the hoisting hook and confining the load therein; 1

In order to produce a postive" upward pull of the shank on the keeper in addition to' the frictional pullagainst the same by means of the clamping bolt and nut an upwardly facing shoulder 3-2 is formed on the central part of the inner side of the shank 10 which shoulder engages with the adjacent upper part of the surface of the keeper, as shown in Figs. 1 and 3. By this means the upper part of the beak 11 is positively and reliably connected with the upper part of the shank so that the beak is strengthened and re-inforced against breakage'under the load and the hoisting hook as a whole is substantially as strong as a completely closed link. i

The inner part of the attaching eye 12' of the shank overhangs to a considerable the hoisting hook, thereby avoiding possible injury to the operatives who are d0- ing the work.

All of the several parts of this hoisting hook and the means for closing the mouth of the same are permanently connected with each other so that they practically form a complete unit, the several parts of which can not become loose, thereby expediting the work of transferring material by means of this hook and reducing the cost accordingly.

Inasmuch as this hoisting hook is comparatively simple in construction and its several parts are strong and durable and not liable to give way under any load likely to be imposed upon the same, this increases the safety of the operatives in the work of handling freight. Moreover this hoisting hook is capable of use in connection with hoisting apparatus of the usual construction now in general use so that no change need be made therein for receiving the hoisting hook made in accordance with this invention.

If the stud bolt 21 should become broken the same can be easily replaced by a new one. In order to compensate for the removal of metal in forming the opening in the shank which receives the stud bolt 21 the adjacent sides of the shank are thickened, as shown at 100, thereby strengthening the shank and enabling the same to sustain the maximum load which is likely to be carried by the hoisting hook.

Instead of making the bolt 21 in the form of a stud bolt, as shown in the drawings, this bolt may be made in one piece with the shank.

I claim as my invention 1. A hoisting hook comprising a shank and a beak, and a keeper movable into and out of a position across the mouth of said hook and having one end pivotally connected with said shank so as to be capable of turning in a plane at right angles thereto and adapted to be detachably connected at its opposite end with said beak and said shank being provided on its front side with a shoulder adapted to engage with the underside of said keeper.

2. A hoisting hook having a shank and a beak provided with an opening, a clamping bolt arranged on the front side of said shank, and a keeper movable into and out of a position across the mouth of said hook and capable of turning on said bolt parallel with the plane of said shank and beak and also sliding lengthwise thereof and provided with a hook adapted to engage with the opening of said beak.

3. A hoisting hook comprising a shank and a beak having an opening, a clamping bolt having a body projecting forwardly from the shank, and a keeper movable into and out of a position across the mouth of said hook and provided at one end with a longitudinal slot which receives said bolt body and a hook at its opposite end which is adapted to engage the opening of said beak.

4. A hoisting hook comprising a shank and a beak having an opening, a clamping and a beak having an opening, a clamping bolt having a body projecting forwardly from the shank, a keeper'movableinto and out of a pomtion across the'mouth of said hook and provided at one end with a longitudinal slot which receives said bolt body and a hook at its opposite end which is adapted to engage the opening of said beak, a screw nut arranged on said bolt body and engaging with the front side of said keeper, and means for preventing said nut from wholly unscrewing from said bolt body.

6. A hoisting hook comprising a shank and a beak having an opening, a clamping bolt having a body projecting forwardly from the shank, a keeper movable into and out of a position across the mouth of said hook and provided at one end with a longitudinal slot which receives said bolt body and a hook at its opposite end which is adapted to engage the opening of said beak, a screw nut arranged on said boltbody and engaging with the front side of said keeper,

JOHN CLARK.